@canton7's response answers the original question.
Dapper doesn't have interceptors, so to solve your real problem (add logging) you have two options:
1. Make own extension methods (bad option):
Make methods like .LoggingQueryAsync(...).
It looks simple at first, but have way too many downsides...
2. Implement IDbConnection method that Dapper calls (good option):
public class LoggingDbConnection : IDbConnection
{
...
public IDbCommand CreateCommand()
{
return new LoggingDbCommand(this);
}
...
}
Dapper have to call IDbConnection.CreateCommand() to do anything.
In LoggingDbCommand implement IDbCommand.ExecuteNonQuery(), IDbCommand.ExecuteReader(), IDbCommand.ExecuteReader(CommandBehavior) and IDbCommand.ExecuteScalar() to add logging.